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Language Support for Java(TM) by Red Hat vs IntelliJ IDEA: catalog facts
Language Support for Java(TM) by Red Hat	IntelliJ IDEA
Free Free to install from the Visual Studio Marketplace.	Freemium The Community Edition is free. IntelliJ IDEA Ultimate requires a paid subscription.
Windows, macOS, Linux	Windows, macOS, Linux
Code completion, linting, formatting and refactoring for Java Maven and Gradle projects recognised automatically	Refactorings and inspections that understand the whole project, not just the file Community Edition is free and open source
Only works inside Visual Studio Code Other platforms need a separately installed JDK 25 or newer	Framework support, profiler and database tools are Ultimate features Indexing a large project is slow and memory-hungry
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.